<template>
  <div>
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>   
    </el-breadcrumb>
    <el-card>
        <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>
        <!-- 这两个数据项共用一个数据项 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
            <el-tabs :tab-position="'left'"  v-model="activeIndex" :before-leave="beforeTabsMove" @tab-click="tabclick">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat">
                         <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps" @change="handleChange"></el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1" >
                    <el-form-item :label="item.attr_name"  v-for="(item) in manyTableData" :key="item.attr_id">
                        <el-checkbox-group v-model="item.attr_vals" >
                            <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                        </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name"  v-for="item in onlyTableData" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                    <!-- action表示图片要上传到的api地址，完成的url地址 -->
                    <el-upload :action="uploadUrl" :on-preview="handlePreview" :on-remove="handleRemove" 
                    list-type="picture" :headers="headObj" :on-success="handleSuccess">
                        <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                   <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                   <el-button type="primary" class="btnAdd" @click="addGoods">添加商品</el-button>
                </el-tab-pane>

            </el-tabs>
        </el-form>
    </el-card>
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%" show-close> 
        <img :src=" previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
    data() {
        return {
            activeIndex:'0',
            addForm:{
                goods_name:'',
                goods_price:'',
                goods_weight:'',
                goods_number:'',
                goods_cat:[],
                pics:[],
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name:[
                    {required: true, message: '请输入商品名称', trigger: 'blur'}
                ],
                goods_price:[
                    {required: true, message: '请输入商品价格', trigger: 'blur'}
                ],
                goods_weight:[
                    {required: true, message: '请输入商品重量', trigger: 'blur'}
                ],
                goods_number:[
                    {required: true, message: '请输入商品数量', trigger: 'blur'}
                ],
                goods_cat:[
                     {required: true, message: '请输入商品分类', trigger: 'blur'}
                ]
            },
            cateList:[],
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
           manyTableData:[],
           onlyTableData:[],
           uploadUrl:'http://127.0.0.1:8888/api/private/v1/upload',
           headObj:{
            //    每次上传期间，都要手动绑定请求token，原本封装的没有包含token
               Authorization:window.sessionStorage.getItem('token')
           },
           previewPath:'',
           previewVisible:false
        }
    },
    created() {
        this.getCateList()
    },
    methods:{
        async getCateList() {
            const {data:res} = await this.$http.get('categories')
            if(res.meta.status !== 200) {
                return this.$message.error('获取分类数据失败')
            }
            this.cateList = res.data
        },
        // 级联选择器选中项变化会触发这个函数
        handleChange() {
            if(this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat =[]
            }
        },
        beforeTabsMove(activename,oldactivename) {  //即将进入的标签的名字   即将离开的标签的名字
            if(oldactivename === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请先选择商品分类')
                return false
            }
        },
        async tabclick() {
            if(this.activeIndex === '1') {
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
                if(res.meta.status !== 200) {
                    this.$message.error('获取动态参数列表失败')
                }
                res.data.forEach(item=> {
                    item.attr_vals = item.attr_vals.length === 0? [] : item.attr_vals.split(',')
                })
                
                this.manyTableData = res.data
            }
            if(this.activeIndex === '2') {
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
                if(res.meta.status !== 200) {
                    this.$message.error('获取静态属性列表失败')
                }
                // res.data.forEach(item=> {
                //     item.attr_vals = item.attr_vals.length === 0? [] : item.attr_vals.split(',')
                // })
                
                this.onlyTableData = res.data
            }
        },
        handlePreview(file) {
            this.previewPath = file.response.data.url
            this.previewVisible = true
        },
        handleRemove(file) {
            const file_path = file.response.data.tmp_path
            const i =  this.addForm.pics.findIndex(x =>x.pic === file_path)
            this.addForm.pics.splice(i,1)
        },
        handleSuccess(response) {
            const picInfo = {pic:response.data.tmp_path}
            this.addForm.pics.push(picInfo)
            console.log(this.addForm.pics);
        },
        addGoods() {
            this.$refs.addFormRef.validate(async valid => {
                if(!valid) return this.$message.error('请填写必要的表单项目')
                // 深拷贝   lodash   cloneDeep(obj)
                const form =   _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                //处理动态参数和静态属性
                this.manyTableData.forEach( item=> {
                    const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals.join(' ')}
                    this.addForm.attrs.push(newInfo)
                })
                this.onlyTableData.forEach(item => {
                    const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals}
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs
                const {data:res} = await this.$http.post('goods',form)
                if(res.meta.status !== 201) {
                    return this.$message.error('添加商品失败')
                }
                this.$message.success('添加商品成功')
                this.$router.push('/goods')
            })
        }
    },
    computed:{
        cateId() {
            if(this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>

<style>
.el-steps {
    margin: 15px 0;
}
.el-step__title {
    font-size: 8px;
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px !important;
}
</style>